Re: Executing user script

[David Brownell <david-b@pacbell.net>]

I have a hard time designing without knowing some of the
context.  If this is truly an "application" rather than a system
tool (of the sort that must integrate closely with other tools
like the hotplug agents), why wouldn't it want to learn only
about certain devices or classes thereof?

If it only wants to know about certain devices, then it's
practical to just add lines to /etc/hotplug/usb.handmap to
run scripts when those devices are added.  In fact, you
should be able to just add an "accepts anything" entry to
that file right now (match_flags is zero, no test fails).

Updating the hotplug data will necessarily bring out
some interesting upgrade issues, whether that data is
viewed as such (all the mapfiles) or as code (scripts).

- Dave


----- Original Message ----- 
From: "Michael Wright" <mwright@aol.net>
To: "David Brownell" <david-b@pacbell.net>
Cc: <Linux-hotplug-devel@lists.sourceforge.net>
Sent: Tuesday, March 27, 2001 10:08 AM
Subject: Re: Executing user script


> 
> Yes, an enhanced hotplug agent behavior. I cannot be certain if this will
> be a common enough task that the scripts should accomodate it
> directly. I am certain that I would use the feature. Basically I do not
> want my application to poll for added/removed devices. I wanted to
> be told that a device was plugged in.
> Also, I did not want to add my personal scripts to the agent so that it
> would be easy to install new releases of hotplug. I am looking for
> something generic.
> 
> -Michael
> 
> On Tue, 27 Mar 2001, David Brownell wrote:
> 
> > > I have a script that I want to call everytime that hotplug gets
> > > activated. (i.e. I want to notify my application everytime a USB device
> > > is added or removed) Is there a way to do this without hard coding
> > > my script name in one of the hotplug scripts?
> > 
> > Sounds exactly like when /etc/hotplug/usb.agent gets called, so
> > at some level you just want a enhanced hotplug agent behavior.
> > 
> > At this point there's no general hook to make that particular
> > behavioral change, so you'd have to modify or replace that
> > agent script.  Do you think this will be a common enough task
> > that the scripts should accomodate it directly?  You didn't say
> > what your "application" does.
> > 
> > As Greg noted, if you have usbdevfs configured there are
> > other ways to get such notifications.  As just one example,
> > the Java USB library has a standard notifier interface that
> > calls out to report add/remove of devices and busses.  I
> > don't think the C "libusb" does such stuff now though.
> > 
> > - Dave
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
> > Linux-hotplug-devel@lists.sourceforge.net
> > http://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel
> > 
> 


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